Cleanup of shader building system

src/gpu/gl/GrGLProgram.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrGLProgram.h"
 
-#include "builders/GrGLFullProgramBuilder.h"
-#include "builders/GrGLFragmentOnlyProgramBuilder.h"
 #include "GrAllocator.h"
 #include "GrProcessor.h"
 #include "GrCoordTransform.h"
 #include "GrGLProcessor.h"
 #include "GrGpuGL.h"
 #include "GrGLPathRendering.h"
 #include "GrGLShaderVar.h"
 #include "GrGLSL.h"
 #include "GrOptDrawState.h"
 #include "SkXfermode.h"
 
 #define GL_CALL(X) GR_GL_CALL(fGpu->glInterface(), X)
 #define GL_CALL_RET(R, X) GR_GL_CALL_RET(fGpu->glInterface(), R, X)
 
-GrGLProgram* GrGLProgram::Create(GrGpuGL* gpu,
-                                 const GrGLProgramDesc& desc,
-                                 const GrGeometryStage* geometryProcessor,
-                                 const GrFragmentStage* colorStages[],
-                                 const GrFragmentStage* coverageStages[]) {
-    SkAutoTDelete<GrGLProgramBuilder> builder;
-    if (desc.getHeader().fUseFragShaderOnly) {
-        SkASSERT(gpu->glCaps().pathRenderingSupport());
-        SkASSERT(gpu->glPathRendering()->texturingMode() ==
-                 GrGLPathRendering::FixedFunction_TexturingMode);
-        SkASSERT(NULL == geometryProcessor);
-        builder.reset(SkNEW_ARGS(GrGLFragmentOnlyProgramBuilder, (gpu, desc)));
+/**
+ * Retrieves the final matrix that a transform needs to apply to its source coords.
+ */
+static SkMatrix get_transform_matrix(const GrProcessorStage& processorStage,
+                                     bool useExplicitLocalCoords,
+                                     int transformIdx) {
+    const GrCoordTransform& coordTransform =
+            processorStage.getProcessor()->coordTransform(transformIdx);
+    SkMatrix combined;
+
+    if (kLocal_GrCoordSet == coordTransform.sourceCoords()) {
+        // If we have explicit local coords then we shouldn't need a coord change.
+        const SkMatrix& ccm =
+                useExplicitLocalCoords ? SkMatrix::I() : processorStage.getCoordChangeMatrix();
+        combined.setConcat(coordTransform.getMatrix(), ccm);
     } else {
-        builder.reset(SkNEW_ARGS(GrGLFullProgramBuilder, (gpu, desc)));
+        combined = coordTransform.getMatrix();
     }
-    if (builder->genProgram(geometryProcessor, colorStages, coverageStages)) {
-        SkASSERT(0 != builder->getProgramID());
-        return SkNEW_ARGS(GrGLProgram, (gpu, desc, *builder));
+    if (coordTransform.reverseY()) {
+        // combined.postScale(1,-1);
+        // combined.postTranslate(0,1);
+        combined.set(SkMatrix::kMSkewY,
+            combined[SkMatrix::kMPersp0] - combined[SkMatrix::kMSkewY]);
+        combined.set(SkMatrix::kMScaleY,
+            combined[SkMatrix::kMPersp1] - combined[SkMatrix::kMScaleY]);
+        combined.set(SkMatrix::kMTransY,
+            combined[SkMatrix::kMPersp2] - combined[SkMatrix::kMTransY]);
     }
-    return NULL;
+    return combined;
 }
 
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
 GrGLProgram::GrGLProgram(GrGpuGL* gpu,
                          const GrGLProgramDesc& desc,
-                         const GrGLProgramBuilder& builder)
+                         const BuiltinUniformHandles& builtinUniforms,
+                         GrGLuint programID,
+                         const UniformInfoArray& uniforms,
+                         GrGLInstalledProcessors* geometryProcessor,
+                         GrGLInstalledProcessors* colorProcessors,
+                         GrGLInstalledProcessors* coverageProcessors)
     : fColor(GrColor_ILLEGAL)
     , fCoverage(GrColor_ILLEGAL)
     , fDstCopyTexUnit(-1)
-    , fBuiltinUniformHandles(builder.getBuiltinUniformHandles())
-    , fGeometryProcessor(SkSafeRef(builder.getGeometryProcessor()))
-    , fColorEffects(SkRef(builder.getColorEffects()))
-    , fCoverageEffects(SkRef(builder.getCoverageEffects()))
-    , fProgramID(builder.getProgramID())
-    , fHasVertexShader(builder.hasVertexShader())
-    , fTexCoordSetCnt(builder.getTexCoordSetCount())
+    , fBuiltinUniformHandles(builtinUniforms)
+    , fProgramID(programID)
+    , fGeometryProcessor(SkSafeRef(geometryProcessor))
+    , fColorEffects(SkRef(colorProcessors))
+    , fCoverageEffects(SkRef(coverageProcessors))
     , fDesc(desc)
     , fGpu(gpu)
-    , fProgramDataManager(gpu, this, builder) {
+    , fProgramDataManager(gpu, uniforms) {
     this->initSamplerUniforms();
 }
 
 GrGLProgram::~GrGLProgram() {
     if (fProgramID) {
         GL_CALL(DeleteProgram(fProgramID));
     }
 }
 
 void GrGLProgram::abandon() {
     fProgramID = 0;
 }
 
 void GrGLProgram::initSamplerUniforms() {
     GL_CALL(UseProgram(fProgramID));
     GrGLint texUnitIdx = 0;
     if (fBuiltinUniformHandles.fDstCopySamplerUni.isValid()) {
         fProgramDataManager.setSampler(fBuiltinUniformHandles.fDstCopySamplerUni, texUnitIdx);
         fDstCopyTexUnit = texUnitIdx++;
     }
     if (fGeometryProcessor.get()) {
-        fGeometryProcessor->initSamplers(fProgramDataManager, &texUnitIdx);
+        this->initSamplers(fGeometryProcessor.get(), &texUnitIdx);
     }
-    fColorEffects->initSamplers(fProgramDataManager, &texUnitIdx);
-    fCoverageEffects->initSamplers(fProgramDataManager, &texUnitIdx);
+    this->initSamplers(fColorEffects.get(), &texUnitIdx);
+    this->initSamplers(fCoverageEffects.get(), &texUnitIdx);
 }
 
+void GrGLProgram::initSamplers(GrGLInstalledProcessors* ip, int* texUnitIdx) {
+    int numEffects = ip->fGLProcessors.count();
+    SkASSERT(numEffects == ip->fSamplers.count());
+    for (int e = 0; e < numEffects; ++e) {
+        SkTArray<GrGLInstalledProcessors::Sampler, true>& samplers = ip->fSamplers[e];
+        int numSamplers = samplers.count();
+        for (int s = 0; s < numSamplers; ++s) {
+            SkASSERT(samplers[s].fUniform.isValid());
+            fProgramDataManager.setSampler(samplers[s].fUniform, *texUnitIdx);
+            samplers[s].fTextureUnit = (*texUnitIdx)++;
+        }
+    }
+}
+
+void GrGLProgram::bindTextures(const GrGLInstalledProcessors* ip,
+                               const GrProcessor& processor,
+                               int effectIdx) {
+    const SkTArray<GrGLInstalledProcessors::Sampler, true>& samplers = ip->fSamplers[effectIdx];
+    int numSamplers = samplers.count();
+    SkASSERT(numSamplers == processor.numTextures());
+    for (int s = 0; s < numSamplers; ++s) {
+        SkASSERT(samplers[s].fTextureUnit >= 0);
+        const GrTextureAccess& textureAccess = processor.textureAccess(s);
+        fGpu->bindTexture(samplers[s].fTextureUnit,
+                          textureAccess.getParams(),
+                          static_cast<GrGLTexture*>(textureAccess.getTexture()));
+    }
+}
+
+
 ///////////////////////////////////////////////////////////////////////////////
 
 void GrGLProgram::setData(const GrOptDrawState& optState,
                           GrGpu::DrawType drawType,
                           const GrGeometryStage* geometryProcessor,
                           const GrFragmentStage* colorStages[],
                           const GrFragmentStage* coverageStages[],
                           const GrDeviceCoordTexture* dstCopy,
                           SharedGLState* sharedState) {
     GrColor color = optState.getColor();
@@ skipping 17 matching lines @@
         } else {
             SkASSERT(!fBuiltinUniformHandles.fDstCopyScaleUni.isValid());
             SkASSERT(!fBuiltinUniformHandles.fDstCopySamplerUni.isValid());
         }
     } else {
         SkASSERT(!fBuiltinUniformHandles.fDstCopyTopLeftUni.isValid());
         SkASSERT(!fBuiltinUniformHandles.fDstCopyScaleUni.isValid());
         SkASSERT(!fBuiltinUniformHandles.fDstCopySamplerUni.isValid());
     }
 
+    // we set the textures, and uniforms for installed processors in a generic way, but subclasses
+    // of GLPrograms determine how to set coord transforms

[bsalomon, 2014/10/06 18:49:40]

GLProgram? no s?

     if (fGeometryProcessor.get()) {
         SkASSERT(geometryProcessor);
-        fGeometryProcessor->setData(fGpu, drawType, fProgramDataManager, geometryProcessor);
+        this->setData<GrGeometryStage>(&geometryProcessor, fGeometryProcessor.get());
     }
-    fColorEffects->setData(fGpu, drawType, fProgramDataManager, colorStages);
-    fCoverageEffects->setData(fGpu, drawType, fProgramDataManager, coverageStages);
+    this->setData<GrFragmentStage>(colorStages, fColorEffects.get());
+    this->setData<GrFragmentStage>(coverageStages, fCoverageEffects.get());
 
-    // PathTexGen state applies to the the fixed function vertex shader. For
-    // custom shaders, it's ignored, so we don't need to change the texgen
-    // settings in that case.
-    if (!fHasVertexShader) {
-        fGpu->glPathRendering()->flushPathTexGenSettings(fTexCoordSetCnt);
+    // Some of GrGLProgram subclasses need to update state here
+    this->didSetData(drawType);
+}
+
+void GrGLProgram::setTransformData(const GrProcessorStage& processor,
+                                   int effectIdx,
+                                   GrGLInstalledProcessors* ip) {
+    SkTArray<GrGLInstalledProcessors::Transform, true>& transforms = ip->fTransforms[effectIdx];
+    int numTransforms = transforms.count();
+    SkASSERT(numTransforms == processor.getProcessor()->numTransforms());
+    for (int t = 0; t < numTransforms; ++t) {
+        SkASSERT(transforms[t].fHandle.isValid());
+        const SkMatrix& matrix = get_transform_matrix(processor, ip->fHasExplicitLocalCoords, t);
+        if (!transforms[t].fCurrentValue.cheapEqualTo(matrix)) {
+            fProgramDataManager.setSkMatrix(transforms[t].fHandle.convertToUniformHandle(), matrix);
+            transforms[t].fCurrentValue = matrix;
+        }
     }
 }
 
+void GrGLProgram::didSetData(GrGpu::DrawType drawType) {
+    SkASSERT(!GrGpu::IsPathRenderingDrawType(drawType));

[bsalomon, 2014/10/06 18:49:40]

why don't we set data for nvpr? or is this just a generic assert that we're not
using this class for nvpr?

[joshua.litt, 2014/10/06 19:16:57]

Exactly, this is just a generic assert.  The only reason the didSetData call
exists is so  legacyNvpr can flush path tex gen.  When legacy NVPR disappears,
we can remove didSetData.  I'll add a comment to that effect

+}
+
 void GrGLProgram::setColor(const GrOptDrawState& optState,
                            GrColor color,
                            SharedGLState* sharedState) {
     const GrGLProgramDesc::KeyHeader& header = fDesc.getHeader();
     if (!optState.hasColorVertexAttribute()) {
         switch (header.fColorInput) {
             case GrGLProgramDesc::kAttribute_ColorInput:
                 SkASSERT(-1 != header.fColorAttributeIndex);
                 if (sharedState->fConstAttribColor != color ||
                     sharedState->fConstAttribColorIndex != header.fColorAttributeIndex) {
@@ skipping 59 matching lines @@
             default:
                 SkFAIL("Unexpected coverage type.");
         }
     } else {
         sharedState->fConstAttribCoverageIndex = -1;
     }
 }
 
 void GrGLProgram::setMatrixAndRenderTargetHeight(GrGpu::DrawType drawType,
                                                  const GrOptDrawState& optState) {
+    // Load the RT height uniform if it is needed to y-flip gl_FragCoord.
+    if (fBuiltinUniformHandles.fRTHeightUni.isValid() &&
+        fMatrixState.fRenderTargetSize.fHeight != optState.getRenderTarget()->width()) {
+        fProgramDataManager.set1f(fBuiltinUniformHandles.fRTHeightUni,
+                                   SkIntToScalar(optState.getRenderTarget()->height()));
+    }
+
+    // call subclasses to set the actual view matrix
+    this->onSetMatrixAndRenderTargetHeight(drawType, optState);
+}
+
+void GrGLProgram::onSetMatrixAndRenderTargetHeight(GrGpu::DrawType drawType,
+                                                   const GrOptDrawState& optState) {
     const GrRenderTarget* rt = optState.getRenderTarget();
     SkISize size;
     size.set(rt->width(), rt->height());
-
-    // Load the RT height uniform if it is needed to y-flip gl_FragCoord.
-    if (fBuiltinUniformHandles.fRTHeightUni.isValid() &&
-        fMatrixState.fRenderTargetSize.fHeight != size.fHeight) {
-        fProgramDataManager.set1f(fBuiltinUniformHandles.fRTHeightUni,
-                                   SkIntToScalar(size.fHeight));
-    }
-
-    if (GrGpu::IsPathRenderingDrawType(drawType)) {
-        fGpu->glPathRendering()->setProjectionMatrix(optState.getViewMatrix(), size, rt->origin());
-    } else if (fMatrixState.fRenderTargetOrigin != rt->origin() ||
-               fMatrixState.fRenderTargetSize != size ||
-               !fMatrixState.fViewMatrix.cheapEqualTo(optState.getViewMatrix())) {
+    if (fMatrixState.fRenderTargetOrigin != rt->origin() ||
+                   fMatrixState.fRenderTargetSize != size ||
+                   !fMatrixState.fViewMatrix.cheapEqualTo(optState.getViewMatrix())) {
         SkASSERT(fBuiltinUniformHandles.fViewMatrixUni.isValid());
 
         fMatrixState.fViewMatrix = optState.getViewMatrix();
         fMatrixState.fRenderTargetSize = size;
         fMatrixState.fRenderTargetOrigin = rt->origin();
 
         GrGLfloat viewMatrix[3 * 3];
         fMatrixState.getGLMatrix<3>(viewMatrix);
         fProgramDataManager.setMatrix3f(fBuiltinUniformHandles.fViewMatrixUni, viewMatrix);
 
         GrGLfloat rtAdjustmentVec[4];
         fMatrixState.getRTAdjustmentVec(rtAdjustmentVec);
         fProgramDataManager.set4fv(fBuiltinUniformHandles.fRTAdjustmentUni, 1, rtAdjustmentVec);
     }
 }
+
+/////////////////////////////////////////////////////////////////////////////////////////
+
+GrGLNvprProgramBase::GrGLNvprProgramBase(GrGpuGL* gpu,
+                                         const GrGLProgramDesc& desc,
+                                         const BuiltinUniformHandles& builtinUniforms,
+                                         GrGLuint programID,
+                                         const UniformInfoArray& uniforms,
+                                         GrGLInstalledProcessors* colorProcessors,
+                                         GrGLInstalledProcessors* coverageProcessors)
+    : INHERITED(gpu, desc, builtinUniforms, programID, uniforms, NULL, colorProcessors,
+                coverageProcessors) {
+}
+
+void GrGLNvprProgramBase::onSetMatrixAndRenderTargetHeight(GrGpu::DrawType drawType,
+                                                           const GrOptDrawState& optState) {
+    SkASSERT(GrGpu::IsPathRenderingDrawType(drawType));
+    const GrRenderTarget* rt = optState.getRenderTarget();
+    SkISize size;
+    size.set(rt->width(), rt->height());
+    fGpu->glPathRendering()->setProjectionMatrix(optState.getViewMatrix(), size, rt->origin());
+}
+
+/////////////////////////////////////////////////////////////////////////////////////////
+
+GrGLNvprProgram::GrGLNvprProgram(GrGpuGL* gpu,
+                                 const GrGLProgramDesc& desc,
+                                 const BuiltinUniformHandles& builtinUniforms,
+                                 GrGLuint programID,
+                                 const UniformInfoArray& uniforms,
+                                 GrGLInstalledProcessors* colorProcessors,
+                                 GrGLInstalledProcessors* coverageProcessors,
+                                 const SeparableVaryingInfoArray& separableVaryings)
+    : INHERITED(gpu, desc, builtinUniforms, programID, uniforms, colorProcessors,
+                coverageProcessors) {
+    int count = separableVaryings.count();
+    fVaryings.push_back_n(count);
+    for (int i = 0; i < count; i++) {
+        Varying& varying = fVaryings[i];
+        const SeparableVaryingInfo& builderVarying = separableVaryings[i];
+        SkASSERT(GrGLShaderVar::kNonArray == builderVarying.fVariable.getArrayCount());
+        SkDEBUGCODE(
+            varying.fType = builderVarying.fVariable.getType();
+        );
+        varying.fLocation = builderVarying.fLocation;
+    }
+}
+
+void GrGLNvprProgram::didSetData(GrGpu::DrawType drawType) {
+    SkASSERT(GrGpu::IsPathRenderingDrawType(drawType));
+}
+
+void GrGLNvprProgram::setTransformData(const GrProcessorStage& processor,
+                                       int effectIdx,
+                                       GrGLInstalledProcessors* ip) {
+    SkTArray<GrGLInstalledProcessors::Transform, true>& transforms = ip->fTransforms[effectIdx];
+    int numTransforms = transforms.count();
+    SkASSERT(numTransforms == processor.getProcessor()->numTransforms());
+    for (int t = 0; t < numTransforms; ++t) {
+        SkASSERT(transforms[t].fHandle.isValid());
+        const SkMatrix& transform = get_transform_matrix(processor, ip->fHasExplicitLocalCoords, t);
+        if (transforms[t].fCurrentValue.cheapEqualTo(transform)) {
+            continue;
+        }
+        transforms[t].fCurrentValue = transform;
+        const Varying& fragmentInput = fVaryings[transforms[t].fHandle.handle()];
+        SkASSERT(transforms[t].fType == kVec2f_GrSLType || transforms[t].fType == kVec3f_GrSLType);
+        unsigned components = transforms[t].fType == kVec2f_GrSLType ? 2 : 3;
+        fGpu->glPathRendering()->setProgramPathFragmentInputTransform(fProgramID,
+                                                                      fragmentInput.fLocation,
+                                                                      GR_GL_OBJECT_LINEAR,
+                                                                      components,
+                                                                      transform);
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////////////////
+
+GrGLLegacyNvprProgram::GrGLLegacyNvprProgram(GrGpuGL* gpu,
+                                 const GrGLProgramDesc& desc,
+                                 const BuiltinUniformHandles& builtinUniforms,
+                                 GrGLuint programID,
+                                 const UniformInfoArray& uniforms,
+                                 GrGLInstalledProcessors* colorProcessors,
+                                 GrGLInstalledProcessors* coverageProcessors,
+                                 int texCoordSetCnt)
+    : INHERITED(gpu, desc, builtinUniforms, programID, uniforms, colorProcessors,
+                coverageProcessors)
+    , fTexCoordSetCnt(texCoordSetCnt) {
+}
+
+void GrGLLegacyNvprProgram::didSetData(GrGpu::DrawType drawType) {
+    SkASSERT(GrGpu::IsPathRenderingDrawType(drawType));
+    fGpu->glPathRendering()->flushPathTexGenSettings(fTexCoordSetCnt);
+}
+
+void GrGLLegacyNvprProgram::setTransformData(const GrProcessorStage& processorStage,
+                                       int effectIdx,
+                                       GrGLInstalledProcessors* ip) {
+    // We've hidden the texcoord index in the first entry of the transforms array for each effect
+    int texCoordIndex = ip->fTransforms[effectIdx][0].fHandle.handle();
+    int numTransforms = processorStage.getProcessor()->numTransforms();
+    for (int t = 0; t < numTransforms; ++t) {
+        const SkMatrix& transform = get_transform_matrix(processorStage, false, t);
+        GrGLPathRendering::PathTexGenComponents components =
+                GrGLPathRendering::kST_PathTexGenComponents;
+        if (processorStage.isPerspectiveCoordTransform(t, false)) {
+            components = GrGLPathRendering::kSTR_PathTexGenComponents;
+        }
+        fGpu->glPathRendering()->enablePathTexGen(texCoordIndex++, components, transform);
+    }
+}